On last night's (May 9) Watch What Happens Live episode, host Andy Cohen asked if Trainor and Charlie Puth — who famously made out during a 2015 American Music Awards performance — ever followed suit offstage. Trainor insists she and Puth are just pals in the clip above, but says there was at least one other instance when they let sparks fly.

"The night we recorded 'Marvin Gaye' I ordered a bottle of Goose, 'cause he needed to loosen up because he was recording all tight," she says. "And then there might have been a drunk make-out, but that was it, honestly." A LIKELY STORY, M-TRAIN.

"I don't know," she offers meekly. "Whatever happened, I don't know, and I'm good friends with Kesha...I want her to put out new music and I think whatever happened is unfair. The whole thing is tragic."